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Summarizes the distribution of students by academic class

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Reference no: EM132394868

Question 1: The following table summarizes the distribution of students by the academic class in a class.

Frequency:

Freshman 23

Sophomore 16

Junior 10

Senior 1

If a student is randomly selected from this class, then what is the probability that this student will be a senior or freshman? (keep 2 decimal places)

Question 2: It is known that 30% of adult workers have a high school diploma. If a random sample of 15 adult workers is selected, what is the probability that 9 of them have a high school diploma? (That is, what is P(X=9?))   (keep 4 decimal places)

Question 3: Suppose a random variable, x, arises from a binomial experiment. If n =14, and p =0.13, find the P(X ≤ 3) using Excel. Round answer to 4 decimal places.

Reference no: EM132394868

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